<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>循环播放大屏视频</title>
    <style>
        body {
            margin: 0;
            padding: 0;
            overflow: hidden;
            background-color: #000;
        }
        video {
            width: 100%;
            height: 100vh;
            object-fit: cover;
        }
    </style>
</head>
<body>
    <video autoplay muted loop>
        <source src="大屏.mp4" type="video/mp4">
        您的浏览器不支持HTML5视频标签。
    </video>
</body>
</html>